package com.itheima.reggie.service.impl;

import cn.hutool.core.util.IdUtil;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.common.ResultInfo;
import com.itheima.reggie.domain.Category;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.Date;
import java.util.List;

@Service
@Transactional
public class CategoryServiceImpl implements CategoryService {

    @Autowired
    private CategoryMapper categoryMapper;

    @Override
    public List<Category> findAll() {
        return categoryMapper.findAll();
    }

    @Override
    public void save(Category category) {
        //1. 补齐参数
//
//        //临时写死
//        category.setCreateTime(new Date());
//        category.setUpdateTime(new Date());
//
//        category.setCreateUser(1L);
//        category.setUpdateUser(1L);
        //设置主键

        category.setId(IdUtil.getSnowflake(1, 1).nextId());

        //2. 调用mapper保存
        categoryMapper.save(category);
    }

    @Override
    public void update(Category category) {
        //1.补齐参数
        //todo 临时写死
        category.setUpdateUser(1L);
        category.setUpdateTime(new Date());
        //2. 调用mapper更新
        categoryMapper.update(category);
    }

    @Override
    public void deleteById(Long id) {
        Integer num1 = categoryMapper.countDishByCategoryId(id);
        if (num1 > 0) {
            throw new CustomException("此分类下存在菜品,不允许删除");
        }

        Integer num2 = categoryMapper.countSetmealByCategoryId(id);
        if (num2 > 0) {
            throw new CustomException("此分类下存在套餐,不允许删除");
        }
        categoryMapper.delete(id);
    }

    @Override
    public List<Category> findByType(Integer type) {
        //select * from category where type = #{}
        LambdaQueryWrapper<Category> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(Category::getType,type);

        return categoryMapper.selectList(wrapper);
    }
}